Which 2 CD set are you referring to?? Right now there's also a 5 CD set out with all of his stuff other than the sessions he did with Muddy, Jimmy Rogers, John Brim, etc, basically the entire Chess masters.

On the tunes you've listed, here are the song keys and harps and positions being used:

Juke tune is in E, he's using a Marine Band in the key of A, played in 2nd position, which is E.My Babe same as aboveBlues with a Feeling tune is in A, he's using a Marine Band in the key of A, playing in 2nd position, which is A.Key to the Highway, tune is in G, he's using a Marine Band in the key of C, played in 2nd position, which is G.

The Marine Bands were all tuned to 7 limit just intonation at the time (all the way up to 1985), and presently, the only harps availalbe today tuned this way stock are the Hering 1923 Vintage Harps and the just tuned version of the Suzuki Fabulous.